Move Device Interfaces from `daqifi-desktop`

[tylerkron]

Description

We need to migrate the core device interfaces from daqifi-desktop to establish the foundation for device interaction in the new daqifi-core library. These interfaces will define how applications can discover, connect to, and communicate with DAQiFi hardware.

Core Interfaces to Migrate

• IDevice - Base interface for all DAQiFi devices
• IStreamingDevice - Interface for devices that support data streaming
• Associated connection/status enums and event args

Why

Moving these interfaces to the core library will:

1. Establish the foundation for device interaction
2. Allow third-party developers to build applications on top of a consistent API
3. Provide a clear abstraction layer between hardware implementation details and application code

Implementation Notes

• Keep interfaces focused and minimal
• Document thoroughly with XML comments
• Ensure compatibility with both .NET 8.0 and 9.0 targets
• Avoid UI dependencies or platform-specific code
• Consider making interfaces more modern (nullable reference types, etc.)

Related Functionality

This will be the first step before moving over:

• Device discovery services
• Connection management
• Message consumer implementation
• Channel configuration

Acceptance Criteria

• All necessary device interfaces migrated
• Comprehensive XML documentation
• No platform-specific dependencies
• Unit tests for interface implementations
• Example usage documented